On Wed, Feb 27, 2008 at 5:16 PM, Andrew Hutchinson <[EMAIL PROTECTED]> wrote: > Register saves by prolog (pushes) are typically made with reference to > "df_regs_ever_live_p()" or "regs_ever_live. "|| > > If my understanding is correct, these calls reflect register USEs and > not register DEFs. So if register is used in a function, but not > otherwise changed, it will get pushed unnecessarily on stack by prolog.
This implies that the register is either a global register or a parameter register, in either case it won't be saved/restored as callee save. What kind of a register is it and how com there's only use of it in a function but it's not a global ? Seongbae
